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merging in Tim Smart's gorgeous deep equality patch for _.isEqual

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This commit is contained in:
Jeremy Ashkenas
2011-10-04 15:56:26 -04:00
parent 7760e6aa52
commit 1facc0e4fe
1 changed files with 4 additions and 5 deletions
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9
underscore.js
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@@ -631,22 +631,21 @@
if (isDateA || isDateB) return isDateA && isDateB && a.getTime() == b.getTime();
// Compare RegExps by their source patterns and flags.
var isRegExpA = _.isRegExp(a), isRegExpB = _.isRegExp(b);
if (isRegExpA || isRegExpB)
if (isRegExpA || isRegExpB) {
// Ensure commutative equality for RegExps.
return isRegExpA && isRegExpB &&
a.source == b.source &&
a.global == b.global &&
a.multiline == b.multiline &&
a.ignoreCase == b.ignoreCase;
}
// Ensure that both values are objects.
if (typeA != 'object') return false;
// Unwrap any wrapped objects.
if (a._chain) a = a._wrapped;
if (b._chain) b = b._wrapped;
// Invoke a custom `isEqual` method if one is provided.
if (typeof a.isEqual == 'function') return a.isEqual(b);
// If only `b` provides an `isEqual` method, `a` and `b` are not equal.
if (typeof b.isEqual == 'function') return false;
if (_.isFunction(a.isEqual)) return a.isEqual(b);
// Assume equality for cyclic structures. The algorithm for detecting cyclic structures is
// adapted from ES 5.1 section 15.12.3, abstract operation `JO`.
var length = stack.length;
@@ -748,7 +747,7 @@
// Is a given value a boolean?
_.isBoolean = function(obj) {
return obj === true || obj === false || typeof obj == 'object' && toString.call(obj) == '[object Boolean]';
return obj === true || obj === false || toString.call(obj) == '[object Boolean]';
};
// Is a given value a date?